Filter



` oci; i2 1926; I 1.60:#126

' T. LINKE l FILTER Filed Jan. 29, 1926 Il. immuun@ l mm l u ulll www,Ww BYM" ATTORNEYS paiement ott.l 12, i925.

einen.

lilter stone.' Associated with" the stione are@ one' or more Scrapersfor. removing from the.v

.surface ofthe stone, slimeand lrei/*gn'in'ate ter which isjV separated'il from "the 1vvater'..

Usually some meansis provided'jofr manual-j' ly effecting relative.vmovement of the-stone and Scrapers 4.tt'ifremove Vthis tl'epiositifafterwhich the casing is flushedto'carry o'thev deposit from ,the Scrapers.VVltd-lilas l,been lheretofore customary tojpermanently attach". Y l A vy. seated 'onf an annular flange Qintegal 'vvitli` the Scrapers directlyto rtljiehcasingf Wall", tvit the result that ithasteer/1-.ejxeduglydif-` .cult to remove fand'rep'lace lavvornscraper.

In accordance Withthe present invention; I mount thelscrapers in acagestructureL and detachably .secure the latter Within.' thek cas-z."

" ing, thereby providing. a 'scraper unit Whitclliv may be readilyremcved, repaired"fandfre"-y By virtue of this'w'nlevv feature., providea -filter ofjfsimpld practical construction -r which .may ylhe readilytaken apart, and V leaned 0r repairedzivvhich Willqbe rug"`ed' anddurable it liegend wnitliwubeweu suitedi'ftomthe requirementsgoteciioiniai l, manufacture and (assembly.

l VW1. l1

Y tio'n's'andv arrangementsof parts, as Will be more fully hereinafterset forthandpointed out in the claims. The invention vmay be 40 morefully understood from the following description in connectionwith*thedaccom-v n panying drawings, wherein,

*Fig l is avieWl mainly/1n longitudinal" f Section througha filterembodying the present'invention. A v Y Fig. 2 is a perspective view ofthe scraper unit showing the same removed vfrom the casing, the filterstone being indicated in dottedlines. N A f 1 p i. Fig is a top planVvievv 'of the scraper unit, the filter stone again beingindicated indottedlines.-

' Injthe drawings Ifhave used the refer-4 ence character l0 to designateaxcylindrical filter casing. VEntering' the upper .endv of the casing isaQvvaterv lsupply pipe 11 con- -v uetrie-esth Y i y y the` above notedfand thef; bjcts tirely conventinnfad fthe new or filtered ,9 in view,'the invention consists 'in certain novel features of. .construction and'coinliiinaL- 1 intermedia@ of T-eoupiing V1a LWithin the couplingtherea suitable vvalve""cl-ontrolled `loy `ahand vvli'eel-ilvvhicll Inay'-kbe manually rotated t0Y 'shut Offv the 'supply of 'Water tothefiiltercasing.` The lovve'rend l offtliefe'asing" is closed 'byfplate lheldagailrs't pacliirigfriiig' 16 vS'cre'v'vs 17 or other suitable securing"devices Near-fthe 'lovver end off the v"casing" I alsof provide a'tutti nitriet is fr -titered water, this uuet being Cannon-ea by;suitable patta; ye. c 1 southern/tapis agsnitatie peeking or; :Sturing.bes f2.0- -in the; pate .155.' is .a 'houw ,spindle ei-,whichjstfvsasan muet pipe per lena-l efr-tte Sterre, is

t v2:6 threaded on l to the upper]sblidjfthfaded ende?- jf .tntlfspindlegftheTportionfo the Spindle between .the threaded seetioperaad`the lewe@ tutti' lar aisehargeenuteingof genral skeleton rtmtin'providing lateral' niet 'perte 2e c omni'n'ifcating,"with 'the yinteriorv ot the tilt fstona. i h Y v inates'infa; ed "edf-'cylindricalp 2.9 borne af socket rigidly (connected to fer urgentes pms-y be en-:Eormedwith a plurality of radially extendingliandle'armst; Y

. The present invention is more particu- 'lerly .concerned with theprovision of novel means for supporting land mounting the" Scrapers 34.vThe scraperfunit'A shown in `perspe'sctive inl Fig. includes a pair ofsieste by ,packing 10oY f spaced cage rings.v Vlilachof the strapersV Y'are approximately semiecirc'ular in cross section,k andere formed ofspring metal:

plates. The free ends of the Scrapers are,v l'

turned-inwardly as at 36 to dene scraping edges. engaging the tilterlstone, andV the other'ends of' the `Scrapers are bifurcated as f atl 37defining a pair of tongues 38 riveted or otherwiseY secured asat39 tothe rings 35'. f' Thug. theentire scraper unit maybe has been in usevment of the cage rings 35 which carry the Scrapers and may ifv desiredhave an actual zhre'aded connection with the upper cage rinoj to,prevent Amovement of the rings in anydirection.` y y Y Y rlhe operationofthe device is substantially as follows. ln assembling, the scraperunit is inserted first through the lower end of the casing. rlhe filterstone vis mounted on the spindle 21, and the spindle and stone areinserted.v The bottom plate 15 is then applied. and thevhandle nut 32,vpipe 3l, and such additional valving as may be deemed necessary aresubsequently attached.

In the ordinaryuse of the filter, the water Hows into the casing throughthe pipe 1l f and around the stone, filtering through the stone itpasses to discharge through the spindle 2l and pipe 3l. After the filterfor a certain length of time, the waterflow isretarded by theaccumulation of a slimy deposit of foreign matter on the exteriorsurfacev of the stone. At this time, the discharge valve vfor filteredwater (not shown). is cut off. Thehandle 33 is grasped and rotated,effecting rotation of the filter stone relative to the scrapers, which,by their own inherent resiliency, press inwardly against the stone.Inasmuch as the stone is relatively soft, the scrapers will quicklyremove the foreign'matter from its surface.V The petcock 19 fis then'yopened, and by flushing water through the filter casing, this foreignmatter willpbe washed from the scraper bladesl and carried olf throughthe petcoclr, and a Ifresh stone surface exposed. f

It will be evident that the novel construction of the removable scraperunit greatly facilitates not only the original assembly of the filter,buty greatly expedites repairs or replacements of scraper blades.

Various changes and alterations might be lnade in the general formandarrangement of parts described without departing from the invention.kHence I do not wish to limit myself to the details set forth,` butvshall consider myself at liberty to make such changes and alterations asfairly fall within the spirit and scope of the appended claims.

l. In a filter, the combination with a lilter casing having waterl inletand discharge Vopenings therein, yand a` rotatably mounted hollow filterstone in the casing through which water in the inlet opening passes tothe discharge opening, ofa scraper unit removably mounted in the casing,including a pair of spaced cage rings fitting` within the casing,scraper blades each secured at one edge to the rings, and each includingfree scraping edges bearing against the stone,

means projecting inwardly from the casingwallinto a notch in one of thevrings preventing rotation of the scraper unit relative to the casing.

2. As a new article of manufacture, a scraper unit of the classdescribed including a pair of cage rings, spring scraper blades eachsecured at one edge to the rings and each including inwardly presentedfree scraping edges7 one of the 4rings being notched for the purposedescribed.

l 3. As a new article ofi'manufacture, a scraper unit of the classdescribedv including a pair ofjcage rings, spring scraper blades eachsecured aty one edge to the rings and each including inwardly presentedfree yscraping edges, the fixed ends of the blades being bifurcate'd todefine a pair of tongues attached to the respective rings. j

THEODORE v,LNKE

